The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

The only depiction of Abraham Lincoln holding a weapon, and the names of all 9,000 Cuyahoga veterans of the Civil War.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

The walls of the iconic dome are hollow and have a secret stairway.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

The angel of death appears to weep black tears at this grave marker.

The 25th President's marble casket can be visited in this classical Ohio tomb.

This recycled wax museum may be the only one that features John Travolta in a Bible scene.

Mausoleums, astronomy, and animatronic dinosaurs at this memorial to an assassinated American president.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

A monument to a Native American leader who was known for never breaking a promise and met his end after signing a deal with white settlers.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

This presidential tomb was not dedicated until years after Harding's death due to personal controversy.

An office built to look like a giant basket.

The only presidential monument to display a late POTUS's actual casket.

The heroic sled dog of the 1925 serum run is preserved in taxidermy.

The spectacular collection of one of the world's best woodcarvers.

This pair of eccentric Ohio castles were built by a pair of brothers who wanted to bring a bit of class to the Ohio wilderness.